"The disciples who were associated with Him in His work, Jesus often released for a season, that they might visit their homes and rest; but in vain were their efforts to draw Him away from His labors. All day He ministered to the throngs that came to Him, and at eventide, or in the early morning, He went away to the sanctuary of the mountains for communion with His Father. MH 55.1"
"And it came to pass in those days, that he went out into a mountain to pray, and continued all night in prayer to God."
Both passages describe Jesus going to the mountains to pray. The EGW passage amplifies this by describing the context of his ministry and the need for communion with the Father.
"Often His incessant labor and the conflict with the enmity and false teaching of the rabbis left Him so utterly wearied that His mother and brothers, and even His disciples, feared that His life would be sacrificed. But as He returned from the hours of prayer that closed the toilsome day, they marked the look of peace upon His face, the freshness and life and power that seemed to pervade His whole being. From hours spent alone with God He came forth, morning by morning, to bring the light of heaven to men. MH 55.2"
"And in the morning, rising up a great while before day, he went out, and departed into a solitary place, and there prayed."
Both passages describe Jesus praying early in the morning and the effect it had on Him. The EGW passage expands on the physical toll of Jesus' ministry and the restorative power of prayer.